lld/test/ELF/relro-bss.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
   3 # RUN: ld.lld %t.o -o %t
   4 # RUN: llvm-readelf -l %t | FileCheck --check-prefix=SEG %s
   5 # RUN: llvm-readelf -S %t | FileCheck %s
   6
   7 # We have 2 RW PT_LOAD segments. p_offset p_vaddr p_paddr p_filesz of the first
   8 # should match PT_GNU_RELRO.
   9 # Because .bss.rel.ro (nobits) doesn't take space, p_filesz < p_memsz.
  10
  11 #           Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  12 # SEG:      LOAD           0x0001c8 0x00000000002011c8 0x00000000002011c8 0x000001 0x000001 R E 0x1000
  13 # SEG-NEXT: LOAD           0x0001c9 0x00000000002021c9 0x00000000002021c9 0x000001 0x002e37 RW  0x1000
  14 # SEG-NEXT: LOAD           0x0001ca 0x00000000002051ca 0x00000000002051ca 0x000001 0x000002 RW  0x1000
  15 # SEG-NEXT: GNU_RELRO      0x0001c9 0x00000000002021c9 0x00000000002021c9 0x000001 0x002e37 R   0x1
  16 # SEG-NEXT: GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0x0
  17
  18 # SEG:      .text
  19 # SEG-NEXT: .data.rel.ro .bss.rel.ro
  20 # SEG-NEXT: .data .bss
  21
  22 # And .data is placed in the next page (sh_offset = alignTo(0x2001, 4096) = 0x3000).
  23
  24 #        [Nr] Name              Type            Address          Off    Size
  25 # CHECK:      .data.rel.ro      PROGBITS        00000000002021c9 0001c9 000001
  26 # CHECK-NEXT: .bss.rel.ro       NOBITS          00000000002021ca 0001ca 002000
  27 # CHECK-NEXT: .relro_padding    NOBITS          00000000002041ca 0001ca 000e36
  28 # CHECK-NEXT: .data             PROGBITS        00000000002051ca 0001ca 000001
  29 # CHECK-NEXT: .bss              NOBITS          00000000002051cb 0001cb 000001
  30
  31 .globl _start
  32 _start:
  33   ret
  34
  35 .section .data.rel.ro, "aw"
  36 .space 1
  37
  38 .section .bss.rel.ro, "aw", @nobits
  39 .space 8192
  40
  41 .section .data, "aw"
  42 .space 1
  43
  44 .section .bss, "aw"
  45 .space 1